Question

Simplify (2y+5) (2y-5)

Answer 1

Answer:

Hey,

There your answer

$We \: know \: the \: formula \: that \\ {(a}^{2} - {b}^{2} ) = (a + b)(a - b) \\ \\ Hence ,\\ \: \: \: \: \: \: \: \: (2y + 5)(2 y- 5) \\ \: \: \: \: = {(2y)}^{2} - {(5)}^{2} \\ \: \: \: \: = 4 {y}^{2} - 25$

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Answer 2

Answer:

${2y}^{2} - 25$

Step-by-step explanation:

From the identity,

$(a + b) (a - b) \\ = {a}^{2} + {b}^{2}$

$(2y + 5)(2y - 5) \\ = {2y }^{2} - {5}^{2} \\ = 2 {y}^{2} - 25$

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